To start, I just want to thank everyone on here who helps out. It's taken me a while to get here, and I have tried my best to read as much on the forum as I can on Frosty's burners. Tonight was the first night trying them out, and they work!
There are a few disclaimers I would like to get out of the way. In the video and photos below, reducers are attached to the burners, but I plan to use stainless couplers on my final product (photo of this attached as well). I was dying to test them out, and accept and understand their behavior outside of a forge is going to be different than when they're inside.
I deviated from the design by adding the needle valves and other associated hardware, but I plan to have a movable wall inside my forge in the event I only want to use one burner, and I wanted to be able to shut one off at a time. In hindsight, I'm thinking I should have copper tubing going from each burner to the needle valves a little further away, so that may change.
Video:
I have not tuned these at all, the mig tips are unfiled.
All of this being said, I have also attached a schematic I believe I stole off of here, mainly to ask if this is a good burner angle. I'm planning to have a flat floor in my forge, which feathers into the walls. I'm going to line the chamber with 2" kaowool, rigidize it, and then cast 1/2" of kast o lite over top. Kiln wash to finish it off.
Let me know if you think there's something I can improve upon in my design. Thank you again to everyone, it has been fun to put this together, and I can't wait to start getting things hot.